In a move to further its partnership, 7,000 company-operated Starbucks locations will begin selling Square’s mobile credit card readers that help small businesses process payments, Square announced today.

On top of Starbucks, Square’s mobile card readers can be purchased at more than 30,000 retail stores including the Apple Store, Target, Best Buy, and Walmart. The cards sell for $10 with a $10 rebate for new users who sign up.